Chapter 3:Transport Layer our goals: understand learn about Internet principles behind transport layer transport layer protocols: services: ■UDP:connectionless ■multiplexing, transport demultiplexing -TCP:connection- ■reliable data oriented reliable transfer transport ■flow control TCP congestion control congestion control Transport Layer 3-2Transport Layer 3-2 Chapter 3: Transport Layer our goals:  understand principles behind transport layer services:  multiplexing, demultiplexing  reliable data transfer  flow control  congestion control  learn about Internet transport layer protocols:  UDP: connectionless transport  TCP: connection￾oriented reliable transport  TCP congestion control